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IJESD 2013 Vol.4(2): 173-178 ISSN: 2010-0264
DOI: 10.7763/IJESD.2013.V4.329

Effectiveness of Grid Orthogonality on Body Fitted Curvilinear Coordinate System in CFD

Ichiro Nakane

Abstract—Body fitted curvilinear coordinate systems (usually abbreviated to “BFC”) are widely used for calculating the flow around arbitrary complex bodies, but generally they are not orthogonal. The accuracy deteriorates if the departure from orthogonality is too large, and non-orthogonal coordinate systems make the application of boundary conditions more complex. In this study, the method for generating the orthogonal BFC based on the non-orthogonal BFC is suggested, and five kinds of calculation grids (one non-orthogonal and four orthogonal grids) are generated. The two-dimensional calculations were performed for the flow around a circular cylinder with these orthogonal and non-orthogonal grids. The calculated results were compared with the measurements and the analytic prediction. The validity of grid orthogonality and the method for generating the orthogonal BFC are confirmed.

Index Terms—Orthogonal curvilinear coordinate system, BFC, CFD, cylinder wake.

I. Nakane is with the Kanagawa Institute of Technology, Kanagawa, Japan (e-mail: inakane@me.kanagawa-it.ac.jp).

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Cite:Ichiro Nakane, "Effectiveness of Grid Orthogonality on Body Fitted Curvilinear Coordinate System in CFD," International Journal of Environmental Science and Development vol. 4, no. 2, pp. 173-178, 2013.

General Information

  • ISSN: 2010-0264 (Print)
  • Abbreviated Title: Int. J. Environ. Sci. Dev.
  • Frequency: Monthly
  • DOI: 10.18178/IJESD
  • Editor-in-Chief: Prof. Richard Haynes
  • Executive Editor: Ms. Nancy Y. Liu
  • Indexing: Scopus (since 2019), DOAJGoogle ScholarCrossref, ProQuest, EBSCO, etc. 
  • E-mail: ijesd@ejournal.net